[vim/vim] Can't load tag file with absolute path on Windows. (#8380)

zoumi

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Jun 14, 2021, 4:45:38 AM6/14/21

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Describe the bug
I have set the tag file path with a absolute path, but gvim can't not find it.

To Reproduce
Detailed steps to reproduce the behavior:

create a tag file: C:\Users\zoumi.cache\HYtags
set tag file path for vim:

:setl tags+=C:\Users\zoumi\.cache\HYtags,tags

check the file exist:

echo filereadable('C:\Users\zoumi\.cache\HYtags')

check if vim can find this tag file

echo tagfiles()      "return 1

Expected behavior
echo tagfiles() should get ['C:\Users\zoumi.cache\HYtags'], but it return []

Environment (please complete the following information):

Vim version

VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Jun 13 2021 22:02:46)
MS-Windows 64-bit GUI version with OLE support
Included patches: 1-2994
Compiled by appveyor@APPVYR-WIN

OS: Windows 10 64bit
Terminal: GUI

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lacygoill

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Jun 14, 2021, 4:58:00 AM6/14/21

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Untested but try to double the backslashes:

:setl tags+=C:\\Users\\zoumi\\.cache\\HYtags,tags
              ^^     ^^     ^^      ^^

Or use :let:

:let &l:tags = &l:tags .. ',' .. 'C:\Users\zoumi\.cache\HYtags,tags'

See :h option-backslash.

zoumi

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Jun 14, 2021, 5:02:32 AM6/14/21

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:setl tags+=C:\Users\zoumi\.cache\HYtags,tags

and

:setl tags+=C:\\Users\\zoumi\\.cache\\HYtags,tags

both get:
echo &tags:
C:\Users\zoumi.cache\HYtags,tags

lacygoill

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Jun 14, 2021, 5:08:54 AM6/14/21

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Ah right. On Windows, backslashes are not removed contrary to Linux:

For Win32 backslashes in file names are mostly not removed. More precise: For
options that expect a file name (those where environment variables are
expanded) a backslash before a normal file name character is not removed. But
a backslash before a special character (space, backslash, comma, etc.) is used
like explained above.

Gary Johnson

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Jun 14, 2021, 12:27:01 PM6/14/21

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On 2021-06-14, zoumi wrote:
> Describe the bug
> I have set the tag file path with a absolute path, but gvim can't not find it.
>
> To Reproduce
> Detailed steps to reproduce the behavior:
>

> 1. create a tag file: C:\Users\zoumi.cache\HYtags
> 2. set tag file path for vim:

>
> :setl tags+=C:\Users\zoumi\.cache\HYtags,tags
>

> 3. check the file exist:

>
> echo filereadable('C:\Users\zoumi\.cache\HYtags')
>

> 4. check if vim can find this tag file

>
> echo tagfiles() "return 1
>
> Expected behavior
> echo tagfiles() should get ['C:\Users\zoumi.cache\HYtags'], but it return []
>
> Environment (please complete the following information):
>
> • Vim version
>
> VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Jun 13 2021 22:02:46)
> MS-Windows 64-bit GUI version with OLE support
> Included patches: 1-2994
> Compiled by appveyor@APPVYR-WIN
>
> • OS: Windows 10 64bit
> • Terminal: GUI

It works for me, on Windows 10 with the same Vim 8.2.2994.

From a Cygwin prompt:

$ touch 'C:\Users\gjohn\Documents\HYtags'

From a Windows Command Prompt:

C:\Program Files\Vim\vim82>gvim -N -u NONE -i NONE
:echo filereadable('C:\Users\gjohn\Documents\HYtags')
1
:setl tags+=C:\Users\gjohn\Documents\HYtags
:echo tagfiles()
['\Users\gjohn\Documents\HYtags']

I'm afraid I can't think of any reason it wouldn't work for you.

Regards,
Gary

vim-dev ML

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Jun 14, 2021, 12:27:23 PM6/14/21

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On 2021-06-14, zoumi wrote:
> Describe the bug
> I have set the tag file path with a absolute path, but gvim can't not find it.
>
> To Reproduce
> Detailed steps to reproduce the behavior:
>

> 1. create a tag file: C:\Users\zoumi.cache\HYtags
> 2. set tag file path for vim:

>
> :setl tags+=C:\Users\zoumi\.cache\HYtags,tags
>

> 3. check the file exist:

>
> echo filereadable('C:\Users\zoumi\.cache\HYtags')
>

> 4. check if vim can find this tag file

>
> echo tagfiles() "return 1
>
> Expected behavior
> echo tagfiles() should get ['C:\Users\zoumi.cache\HYtags'], but it return []
>
> Environment (please complete the following information):
>
> • Vim version
>
> VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Jun 13 2021 22:02:46)
> MS-Windows 64-bit GUI version with OLE support
> Included patches: 1-2994
> Compiled by appveyor@APPVYR-WIN
>
> • OS: Windows 10 64bit
> • Terminal: GUI

It works for me, on Windows 10 with the same Vim 8.2.2994.

From a Cygwin prompt:

$ touch 'C:\Users\gjohn\Documents\HYtags'

From a Windows Command Prompt:

C:\Program Files\Vim\vim82>gvim -N -u NONE -i NONE
:echo filereadable('C:\Users\gjohn\Documents\HYtags')
1
:setl tags+=C:\Users\gjohn\Documents\HYtags
:echo tagfiles()
['\Users\gjohn\Documents\HYtags']

I'm afraid I can't think of any reason it wouldn't work for you.

Regards,
Gary

zoumi

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Jun 14, 2021, 8:18:13 PM6/14/21

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@vim-ml I found it's because the dir name ".cache".If I change the name to "cache" it works.
I have set .gitignore to ignore all .* file, does this affects vim?

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zoumi

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Jun 16, 2021, 8:15:02 AM6/16/21

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So,is it a bug?

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zoumi

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Jun 19, 2021, 3:01:48 AM6/19/21

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It' because the plugin 'ZSaberLv0/ZFVimIgnore' set ".cache" in the wildignore option.

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zoumi

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Jun 19, 2021, 3:01:49 AM6/19/21

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Closed #8380.

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